package jdbc;

import com.alibaba.druid.pool.DruidDataSource;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

/**
 * 使用当前类管理数据库连接
 */
public class DBUtil {

    private static DruidDataSource druidDataSource;

    static{
//        //驱动加载一次即可
//        try {
//            Class.forName("com.mysql.cj.jdbc.Driver");
//        } catch (ClassNotFoundException e) {
//            e.printStackTrace();
//        }

        druidDataSource = new DruidDataSource();
        druidDataSource.setUrl("jdbc:mysql://localhost:3306/tedu?characterEncoding=utf8&useSSL=false&serverTimezone=Asia/Shanghai&rewriteBatchedStatements=true");
        druidDataSource.setUsername("root");
        druidDataSource.setPassword("root");

        druidDataSource.setInitialSize(5); //初始链接数量
        druidDataSource.setMaxActive(20); //最大链接数
    }


    public static Connection getConnection() throws SQLException {
//        return DriverManager.getConnection(
//                "jdbc:mysql://localhost:3306/tedu?characterEncoding=utf8&useSSL=false&serverTimezone=Asia/Shanghai&rewriteBatchedStatements=true",
//                "root",
//                "root");

        return druidDataSource.getConnection();
    }
}
